The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Oct. 15, 1996
Applicant:
Inventors:
Nobuyuki Sashida, Utsunomiya, JP;
Toshio Banba, Utsunomiya, JP;
Naoshige Takeda, Utsunomiya, JP;
Mitsuhiro Yamamoto, Hiroshima, JP;
Assignee:
Sumitomo Bakelite Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
4302831 ; 4302871 ; 522164 ;
Abstract
By using a polyamic acid ester comprising the following structural units (1a), (1b) and (1c) as a photosensitive resin and a sulfonamide compound or a specific glycol ether acetate as a stabilizer, a photo-sensitive resin composition excellent especially in viscosity stability can be obtained, and by using the above photosensitive resin and a specific developer, a relief pattern of high resolution can be formed. ##STR1## (the symbols in the formulas are as defined in the specification)